Pigmentation treatment in Singapore depends on the type of pigment. Sun spots and freckles sit in the upper skin and are often addressed with pigment-targeting laser; post-inflammatory marks need inflammation control, topical agents and gentle laser; melasma is managed long term with sun protection, topical or oral therapy and conservative laser toning. Diagnosis comes before treatment.
| Type | What it looks like | Where it sits | Usual approach | Caution |
|---|---|---|---|---|
| Sun spots (solar lentigines) | Well-defined brown spots on sun-exposed skin | Upper skin | Pigment-targeting laser | New spots form with sun |
| Freckles | Small spots, darker in sun | Upper skin | Pico laser; sun protection | Return with sun exposure |
| Post-inflammatory pigmentation | Brown marks after acne or injury | Upper skin | Inflammation control, topicals, gentle laser | Aggressive heat can worsen it |
| Melasma | Symmetrical patches on cheeks, forehead, upper lip | Upper and deeper skin | Sun protection, topical or oral therapy, conservative toning | Heat and aggressive laser can worsen it |
| Hori’s naevus | Grey-brown patches on cheeks and temples | Deeper dermis | Laser targeting deeper pigment, in stages | Often mistaken for melasma |
Related: which brown is yours? · pico laser Singapore · pigmentation worse after laser.
Pigmentation: quick answers
Can laser pigmentation removal be done on the day of consultation?
Usually not. The first visit is a consultation: the pigment is examined in appropriate light, with a dermatoscope where needed, and its type and depth are named before any laser is chosen. The laser is not fired on the same day unless that was agreed in advance. A test patch is used first where appropriate.
What pigmentation cannot be removed by laser?
Melasma is managed rather than removed, because heat can trigger rebound darkening. Pigment that is still being produced, for example by ongoing acne, eczema or friction, returns until the cause is controlled. A raised growth such as a seborrhoeic keratosis is not a pigment deposit and is removed physically instead. Any mark that is new, changing, raised or bleeding needs a diagnosis first.
Is pigmentation removal the same as skin whitening?
No. Pigmentation removal aims to reduce excess pigment, such as a sun spot or a post-acne mark, so the area sits closer to your natural tone. It does not change your natural skin colour. Products that promise a lighter base tone are a different idea, and some carry safety concerns, which the brightening and whitening sections of this guide explain.
Does skin pigmentation treatment in Singapore always start with laser?
No. It starts with the diagnosis. Melasma starts with sun protection and topical agents, post-inflammatory marks start with controlling the inflammation behind them, and a raised seborrhoeic keratosis is removed physically rather than lasered. Discrete sun spots, freckles and dermal pigment such as Hori’s naevus are where a pigment laser is usually first-line, chosen by depth and skin type.
Which laser removes pigmentation in Singapore?
It depends on the chromophore and the depth. Picosecond and Q-switched lasers target melanin: 532 nm for superficial spots, 1064 nm for dermal pigment and low-energy toning of diffuse pigment in Fitzpatrick III to V skin. R2 Glow uses long-pulsed 755 and 1064 nm to calm the inflammation behind uneven tone. IPL is broad-spectrum light rather than a laser and is avoided in melasma and darker skin.
Can laser pigmentation removal be used on Hori’s naevus?
Yes, with care. Hori’s naevus sits in the dermis, so creams and 532 nm light do not reach it; 1064 nm Q-switched or picosecond laser is the usual option, delivered in staged, conservative visits after melasma has been excluded or controlled, because darkening after laser is common in this condition and in Fitzpatrick III to V skin.
Can medicines cause pigmentation?
Yes. Some medicines can darken the skin directly, including certain antibiotics, antimalarials and chemotherapy drugs, while hormonal treatments such as the contraceptive pill can trigger or worsen melasma. Others make skin more sensitive to sunlight. Bring a list of your medicines and supplements to the assessment. Prescribed medicines should not be stopped without speaking to the doctor who prescribed them.
Is pigmentation a sign of a medical problem?
Most facial pigmentation is cosmetic, driven by sun, hormones or inflammation. A spot that is new in later life, changing, irregular, raised or bleeding is examined before any treatment, and referred to a dermatologist where needed. Less often, widespread darkening can be linked to conditions such as Addison’s disease or haemochromatosis, which is why the history and examination come first.
Is IPL suitable for pigmentation?
IPL suits some fair skin with sun damage and redness, because its broad light is absorbed by pigment and vessels together. In darker skin, and in melasma, broad light and heat carry a higher risk of rebound darkening, so it is used cautiously if at all. Pigment-specific lasers at conservative settings are often preferred in Fitzpatrick III–V skin.
Does a chemical peel help pigmentation?
A superficial peel can help surface pigment and dullness by speeding the shedding of pigmented cells, and it is sometimes used alongside creams. It does not reach deeper pigment such as Hori’s naevus, and in sensitive or darker skin an irritating peel can itself cause post-inflammatory marks. Whether a peel suits you depends on the pigment type and skin, decided at assessment.
Is there downtime after pigmentation removal?
It depends on the laser and the type of pigment. Low-energy laser toning usually leaves little visible downtime, while targeted treatment of a sun spot can leave a small dark crust that flakes off over several days. Careful sun protection afterwards lowers the risk of darkening.
Which pigmentation treatment suits which type of pigment?
It depends on the type of pigment. Sun spots and freckles often respond to pigment-targeting laser; post-inflammatory marks need inflammation control and gentle treatment; melasma is managed long term with sun protection, topical or oral therapy and conservative laser. Diagnosis comes first.
Can laser make pigmentation worse?
Yes, particularly melasma and post-inflammatory pigmentation in darker skin, where heat and inflammation can trigger more pigment. That is why the type is diagnosed first and settings are conservative in Fitzpatrick III to V skin.
Can pigmentation come back after treatment?
It depends on the type. Sun spots and freckles can be lightened, but new ones form with sun exposure, although a sun spot that has cleared does not usually return in the same place. Post-inflammatory marks fade once the inflammation behind them stops; new acne or irritation can leave new marks. Melasma is a chronic tendency that is controlled rather than cured, and it tends to recur with ultraviolet light, heat, hormonal change or skin inflammation. Daily sun protection and planned review are part of every plan.
- Types of Skin Pigmentation
- Why Laser Can Worsen Melasma
- Pigmentation Treatments
- Pico or Q-switched laser for pigmentation?
- Can freckles be removed?
- What is cysteamine, and how does it compare with hydroquinone?
- What determines the cost of pigmentation removal in Singapore?
- What happens during laser pigmentation removal?
- Skin brightening treatment vs whitening: what is realistic?
- Are skin whitening injections and creams safe?
- Frequently Asked Questions
- Main types
- Melasma, post-inflammatory hyperpigmentation (PIH), solar lentigines (sun spots) and freckles
- Why diagnosis comes first
- Each type sits at a different depth with a different driver; a treatment suited to one can worsen another
- Melasma
- Chronic and relapsing; managed with sun protection, topical or oral therapy and conservative laser toning rather than cleared by one treatment
- Laser in Asian skin
- In Fitzpatrick III–V skin, wavelength and energy are chosen conservatively because over-treatment can trigger PIH
- Sun protection
- Daily broad-spectrum SPF 50+ is part of every plan; ultraviolet levels in Singapore are high year-round
- When to refer
- A new, changing, irregular or bleeding dark spot is examined for other causes before any cosmetic treatment
What causes pigmentation, and which in-clinic options suit which cause
Pigmentation treatment in Singapore works when the cause is named before the device. Ultraviolet light, hormones, inflammation, friction, some medicines and, less often, medical conditions all add pigment. The cause decides whether the plan leads with sun protection, creams, laser or a referral. Treating the colour without the cause is a common reason marks return.
| Option | What it does | Tends to suit | Not for |
|---|---|---|---|
| Low-energy laser toning (1064 nm) | Gently breaks up diffuse pigment with little heat | Diffuse PIH and uneven tone; melasma within a wider plan | A new, changing or irregular spot |
| Picosecond or Q-switched spot treatment | Fragments discrete pigment in the upper skin | Sun spots and freckles | Melasma at high energy |
| Chemical peel | Speeds the shedding of pigmented surface cells | Superficial PIH and dullness in suitable skin | Sensitive or inflamed skin, and deeper pigment |
| Intense pulsed light (IPL) | Broad-spectrum light absorbed by pigment and vessels | Fair skin with sun damage and redness | Melasma and darker skin types, where rebound darkening is more likely |
Chemical peels and IPL are described for comparison; the plans on this page use laser toning, R2 Glow Laser and pico laser.
Who in-clinic pigment treatment suits, and who should wait
- Suits: discrete sun spots and freckles on skin that can be kept out of the sun.
- Suits: post-inflammatory marks once the acne, eczema or irritation behind them is controlled.
- Suits, with care: melasma, inside a long-term plan led by sun protection and creams.
- Wait: pregnancy and breastfeeding, a fresh tan or sunburn, or active skin infection.
- Examine first: any spot that is new, changing, raised or bleeding.
How Dr Sin Yong approaches it
Dr Sin Yong examines the pigment himself, in person, before any device is chosen. Dermoscopy and a Wood's lamp help judge the type and how deep it sits. Many faces carry more than one type, so each is named and treated in a set order. In Fitzpatrick III–V skin he calibrates laser settings to the skin tone at every session, because heat is what triggers rebound darkening. Diffuse pigment and uneven tone may be planned with R2 Glow Laser, a brightening and toning protocol calibrated for Asian skin, or with low-energy laser toning. Melasma is managed with sub-ablative toning, topical maintenance, strict sun protection and oral photoprotection, never aggressive laser. Post-inflammatory marks start with controlling the inflammation behind them.
What decides the plan
- The pigment type, and whether several types coexist.
- How deep the pigment sits.
- The cause: sun, hormones, inflammation, friction or medicines.
- Skin type, and how the skin has reacted to heat before.
- Pregnancy plans, current medicines, and screening before oral tranexamic acid.
- How much daily sun protection is realistic, and the need for maintenance.
Skin pigmentation treatment in Singapore: match the brown to the layer
Skin pigmentation treatment in Singapore goes wrong most often for one reason: the brown is treated as one thing. It is not. Melasma, sun spots, post-inflammatory marks, freckles, Hori's naevus and seborrhoeic keratosis sit at different depths, respond to different first-line options, and each has a laser that makes it worse. Dr Sin Yong examines the pigment himself with dermoscopy and a Wood's lamp before any device is chosen, because the depth decides whether a cream, a pigment laser or a physical removal can reach it. The table below is organised by diagnosis rather than by machine, which is the order the decision is made in clinic.
| Diagnosis | Where the pigment sits | Usual first-line option | Laser that is wrong for it | Page |
|---|---|---|---|---|
| Melasma | Epidermal, dermal or mixed; often mixed, with an inflammatory and vascular component that heat aggravates | Strict sun protection and topical agents first; low-energy laser toning only inside a long-term plan | High-energy pigment laser, IPL and ablative resurfacing, which can leave melasma darker than before | Melasma treatment |
| Sun spots (solar lentigines) | Epidermal: a discrete deposit in the upper skin | Picosecond or Q-switched spot treatment, with sun protection to limit new ones | Ablative resurfacing of the whole face for a few discrete spots; IPL in darker skin types, where rebound darkening is more likely | Sun spots |
| Post-inflammatory hyperpigmentation (PIH) | Epidermal or dermal, depending on how deep the injury behind it went | Control the acne, eczema or irritation first; topical agents, then low-energy 1064 nm toning for what remains | Any high-fluence pigment laser or IPL applied while the skin is still inflamed, because heat is what triggers more PIH | PIH |
| Freckles (ephelides) | Epidermal; darken with sun and fade when exposure drops | Sun protection, then pigment laser for discrete freckles if wanted | Aggressive ablative treatment; nothing removes the tendency, so new freckles follow sun exposure | Freckles removal |
| Hori's naevus (ABNOM) | Dermal: clusters of grey-brown or bluish spots across the cheeks, common in Asian skin | 1064 nm Q-switched or picosecond laser in staged, conservative visits, after melasma is excluded or controlled | 532 nm and IPL, which are absorbed in the epidermis and do not reach it; creams do not reach it either | Hori's naevus |
| Seborrhoeic keratosis (age warts) | A raised, waxy growth of surface cells, not a pigment deposit | Dermoscopic confirmation that it is benign, then physical removal: cryotherapy, curettage, electrocautery or ablative laser | Pigment lasers and IPL, which target melanin rather than a growth | Seborrhoeic keratosis |
Two cautions follow from the table. Many faces carry more than one type at once, most often melasma over sun spots, or Hori's naevus mistaken for melasma, so each is named and treated in a set order, the one that heat would aggravate coming last. And any mark that is new, changing, raised or bleeding is examined before anything is pointed at it, because a pigmented skin cancer can mimic a sun spot or an age wart. The full set of face pigmentation types is on pigmentation types on the face, and every pigment and redness guide on this site is listed on the pigmentation hub.
For which laser is used for which pigment, see the pigmentation removal singapore page.
A Bahasa Melayu overview for visitors from Malaysia is at rawatan pigmentasi (Bahasa Melayu).
Related reading: what to expect at a pico laser visit, from the test patch to the review.
Related reading: aftercare after melasma treatment, including the sun rules and rebound signs.
Types of Skin Pigmentation
Melasma — Chronic, hormonally influenced pigmentation with symmetrical brown-grey patches on the cheeks, upper lip, forehead and chin. Triggered by UV exposure and hormonal changes. Prone to relapse, and aggressive laser can worsen it.
Post-Inflammatory Hyperpigmentation (PIH) — Dark marks after acne, injury or inflammation. Often managed with low-energy laser toning and topical lightening agents; the course is planned individually.
Solar Lentigines (Sun Spots) — Flat, discrete brown spots from cumulative UV exposure. Discrete pigment in the upper skin, often addressed with pigment-targeting laser; the course is planned individually.
Freckles — Genetic, UV-exacerbated pigmentation. Can be lightened with pigment-targeting laser but tend to recur with sun exposure without protection.
Brown marks that should be checked before any pigmentation treatment
Most brown marks on the face are harmless, but a few need a diagnosis before any laser, cream or peel is used on them. Pigmentation treatment in Singapore should never start on an undiagnosed patch, because the wrong treatment can hide a lesion that needed attention, or make a condition such as melasma worse. These are the signs that change the order of things.
| Sign | Why it matters | What happens first |
|---|---|---|
| A single dark spot that is new, changing, irregular or bleeding | It may not be pigmentation at all | Dermoscopy; referral to a dermatology specialist or mole assessment if the diagnosis is uncertain; no laser |
| Symmetrical patches that began in pregnancy or with hormonal medicine | The pattern of melasma, which heat can provoke | A melasma plan built on sun protection and creams; see melasma treatment |
| Patches that darkened after a laser, peel or facial | Inflammation is making new pigment | Stop energy treatments, protect from the sun, then reassess; see pigmentation darker after laser |
| Marks that persist despite daily sun protection | The type and depth are not yet known | Examination by type and depth before any device is chosen |
At the assessment Dr Sin Yong examines the pigment himself with dermoscopy and a Wood's lamp. A lesion whose diagnosis is uncertain is referred before anything is done to it, and it is never lasered to see what happens. For the common browns, the facial pigmentation types guide sets out how melasma, sun spots, post-inflammatory marks and freckles are told apart.
Two things that are often tried first do not reach the problem. Whitening facials act on the surface and do not reach pigment held deeper in the skin, and scrubbing adds friction, which can deepen melasma. Neither is harmful in itself for most skin, but neither is a substitute for knowing which brown it is.
Why Laser Can Worsen Melasma
Melasma involves epidermal and often dermal pigment with chronic melanocyte hyperactivity. Aggressive laser — particularly high-energy Q-switched or fractional ablative — can trigger melanocyte stimulation, causing paradoxical darkening after initial improvement. The correct approach: sub-ablative, low-energy Q-switched laser toning; topical maintenance under medical supervision; strict SPF 50+; and oral photoprotection (Heliocare Luminance with Fernblock® technology).
“Melasma management is a long-term commitment — no single treatment eliminates it.”
Dr Sin YongOn managing melasma
“That's a chemical burn waiting for sunlight. And in this climate, sunlight is not optional.”
Dr Sin YongOn lemon juice as a home remedy · from his Instagram explainer series
Laser treatment for pigmentation: pico, Q-switched, R2 Glow and IPL by chromophore
Laser treatment for pigmentation works because melanin absorbs particular wavelengths of light more strongly than the surrounding skin does. That absorption target is the chromophore, and the chromophore decides the wavelength: 532 nm is absorbed strongly by melanin and stays superficial, 755 nm and 785 nm reach a little deeper, and 1064 nm passes through much of the epidermal melanin to reach dermal pigment, which is why it is the conservative choice in Fitzpatrick III to V skin and the usual wavelength for laser toning. Pulse duration is the second variable. A Q-switched laser delivers its energy in nanoseconds; a picosecond laser delivers it roughly a thousand times faster, so pigment is fragmented more by a pressure effect than by heat. The detail is on pico vs Q-switched laser.
| Option | Chromophore and wavelength | How it acts | Tends to suit | Not for | Page |
|---|---|---|---|---|---|
| Picosecond laser | Melanin; 532, 755, 785 or 1064 nm depending on platform | Picosecond pulses shatter pigment with less heat spreading into the surrounding skin | Discrete sun spots and freckles; dermal pigment such as Hori's naevus at 1064 nm | Melasma at high energy; inflamed skin | Pico laser |
| Q-switched laser | Melanin; 532 or 1064 nm | Nanosecond pulses; at low energy and 1064 nm it is the usual tool for laser toning of diffuse pigment | Diffuse PIH and uneven tone; melasma inside a wider plan, gently | A new, changing or irregular spot; high fluence in darker skin | Laser toning |
| R2 Glow Laser | Long-pulsed 755 nm alexandrite and 1064 nm Nd:YAG, surface left intact | Dr Sin Yong's tone protocol works upstream, calming the low-grade inflammation that keeps melanocytes switched on and leaves a reddish background | Dull, uneven tone with both a brown deposit and a reddish, inflammatory background; calibrated for Fitzpatrick III to V skin | A single discrete spot that needs a pigment pass rather than a tone protocol | R2T2 laser |
| Intense pulsed light (IPL) | Broad-spectrum light absorbed by both melanin and haemoglobin; not a laser | Heats pigment and vessels together across a broad band of wavelengths | Fair skin with sun damage and redness | Melasma and darker skin types, where rebound darkening is more likely; described here for comparison, not used in the plans on this page | Pigmentation types |
Laser pigmentation removal in Singapore therefore comes down to three questions, in order: what the pigment is, how deep it sits, and how the skin has reacted to heat before. The first two choose the wavelength; the third sets the energy, which Dr Sin Yong calibrates to the skin tone at every session. On the day, discrete spots usually darken and form fine crusts that flake away, while low-energy toning for diffuse pigment leaves only transient redness; the sequence is set out under what happens during laser pigmentation removal on this page. Where the pigment is actually a raised growth, such as a seborrhoeic keratosis, a pigment laser is the wrong tool and physical removal is planned instead.
Which laser removes which pigment, and the darkening risk by skin tone, are set out on laser treatment for pigmentation.
Pigmentation Treatments
R2 Glow Laser — A brightening and toning protocol calibrated for Asian skin tones (Fitzpatrick III–V), used where pigment is diffuse; it may form part of a plan for PIH, solar lentigines, freckles and mild melasma.
FSX Laser — Addresses pigmentation alongside pore reduction, skin tightening and collagen remodelling within the same treatment plan.
Heliocare Luminance — Oral photoprotection with Fernblock® technology. Used as an adjunct to topical sun protection; whether it suits you is discussed at consultation.
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All treatments performed personally by Dr Sin Yong on Orchard Road, Singapore.
WhatsApp +65 8023 7170Pico or Q-switched laser for pigmentation?
Both are pigment lasers; the difference is pulse duration. A Q-switched laser delivers its energy in nanoseconds, while a picosecond laser delivers it roughly a thousand times faster. The shorter pulse fragments pigment more by a pressure effect than by heat, so less heat spreads into surrounding skin, which matters in Fitzpatrick III to V skin, where heat and inflammation are what trigger post-inflammatory hyperpigmentation.
That does not make one universally right. Wavelength matters as much as pulse length: 532 nm is strongly absorbed by melanin and suits superficial spots, while 1064 nm reaches deeper and is absorbed less by the surface, making it the more conservative choice in darker skin and the usual wavelength for low-energy laser toning. In melasma, either technology is used gently, within a plan built around sun protection and topical therapy, because over-treatment can leave melasma darker than before. The useful question is not which machine but what the pigment is and how deep it sits. Dr Sin Yong's pico laser guide covers the picosecond side in more detail.
Can freckles be removed?
Freckles can be lightened, but not prevented from returning. True freckles, or ephelides, are small, flat, light-brown spots driven by genetics and darkened by sun exposure; they typically fade when sun exposure drops and darken again with it. Because the pigment sits in the upper layer of the skin, they respond to pigment-targeting laser, but the tendency to produce them remains, so new freckles appear with ultraviolet exposure unless sun protection is consistent.
Several other marks are commonly called freckles and behave differently. Solar lentigines are larger, darker sun spots that appear later in life and do not fade in winter. Hori's naevus appears as clusters of grey-brown or bluish spots across the cheeks, sits deeper in the dermis, is common in Asian skin and is frequently mistaken for freckles or melasma; it needs a different wavelength and a longer plan. Melasma forms patches rather than discrete dots. Treating each of these as a freckle is a common reason a laser course disappoints, which is why the marks are examined before any treatment is chosen.
What is cysteamine, and how does it compare with hydroquinone?
Cysteamine is a naturally occurring compound that reduces melanin production, used as a depigmenting cream mainly for melasma. It is typically applied for a short contact period and then washed off, because it can cause warmth, redness and a noticeable odour. Its appeal is that it offers a non-hydroquinone option for people who cannot tolerate hydroquinone or who need longer-term maintenance.
Hydroquinone works by inhibiting tyrosinase, the enzyme melanocytes use to make pigment. It has the longer track record, but it can irritate, and prolonged unsupervised use carries a risk of a rare paradoxical darkening called exogenous ochronosis, which is why it is used under medical supervision and in planned courses. Other options include azelaic acid, which is gentle enough for sensitive skin; tretinoin, which speeds pigment turnover; and topical or oral tranexamic acid, which acts on a different pathway in melasma. These agents are often combined, and the choice depends on the type of pigment, skin sensitivity, pregnancy plans and how long maintenance is likely to last. No topical agent replaces daily sun protection.
What determines the cost of pigmentation removal in Singapore?
Prices are not published on this site, but the factors that determine the cost of pigmentation removal can be set out. The first is the diagnosis: a few sun spots on one cheek and diffuse melasma across both cheeks are very different pieces of work.
The second is the method. Some pigment is managed mainly with topical or oral therapy, some with laser, and many plans combine the two. The area treated, the wavelengths needed and whether a fractional mode is used for texture at the same time all change the plan. The third is time: discrete sun spots may need a short course, while melasma is managed with maintenance rather than a single block of treatment, and that ongoing element is part of the cost discussion. Dr Sin Yong sets out the cost clearly at consultation, once the pigment has been examined and the plan agreed.
| Option | What it does | What it cannot do | Typical recovery | Who it tends to suit |
|---|---|---|---|---|
| Pigment-targeting laser (1064 nm laser toning, picosecond laser) | Fragments melanin so the skin can clear it, with wavelength and energy chosen for the pigment depth and skin type | Does not stop the hormonal, ultraviolet or vascular drivers of melasma, so that pigment can return | Usually transient redness; small spots may darken and flake as they clear | Sun spots, freckles and some post-inflammatory marks; conservative settings only in melasma |
| R2 Glow Laser | A brightening and toning protocol calibrated for Fitzpatrick III–V skin, used where pigment is diffuse | Not a tool for discrete raised lesions, and does not address the cause of melasma | Usually transient redness | Diffuse pigment and uneven tone in Asian skin, as part of a wider plan |
| Topical lightening agents (hydroquinone, azelaic acid, tretinoin, cysteamine, tranexamic acid) | Reduce melanin production or transfer at its source | Slow to act; some irritate, and hydroquinone is used under medical supervision | No procedural recovery; irritation is possible | Melasma and post-inflammatory marks, and maintenance after laser |
| Oral tranexamic acid | Interrupts plasmin-related pathways that contribute to melasma | Not suitable with a history or raised risk of blood clots; melasma can return after stopping | A prescribed course after screening | Melasma that has not settled with topical treatment and sun protection, after assessment |
| Sun protection and oral photoprotection | Reduces the ultraviolet and visible-light stimulation that drives new pigment | Does not clear existing pigment on its own | None | Everyone with pigmentation, and essential in melasma |
| Referral for a changing or uncertain spot | Examination and, where needed, biopsy to exclude skin cancer and other conditions | Not a cosmetic treatment | Depends on the procedure required | Any dark spot that is new in later life, changing, irregular, raised or bleeding; referred to a dermatologist |
- Melasma (facial pigmentation) — DermNet, 2020.
- Melasma: an Up-to-Date Comprehensive Review — Dermatology and Therapy (Ogbechie-Godec OA, Elbuluk N), 7:305–318, 2017.
- Postinflammatory Hyperpigmentation: Epidemiology, Clinical Presentation, Pathogenesis and Treatment — American Journal of Clinical Dermatology (Kaufman BP, Aman T, Alexis AF), 19:489–503, 2018.
- Postinflammatory Hyperpigmentation — StatPearls, NCBI Bookshelf (Lawrence E, Syed HA, Al Aboud KM), 2024.
- Solar lentigo. DermNet. dermnetnz.org
- Postinflammatory hyperpigmentation. DermNet. dermnetnz.org
- Treatment of acquired bilateral nevus of Ota-like macules (Hori's nevus) using 1064-nm Q-switched Nd:YAG laser with low fluence. International Journal of Dermatology, 2009. pubmed.ncbi.nlm.nih.gov
- Comparative appraisal with meta-analysis of picosecond versus nanosecond lasers for hyperpigmented disorders and tattoos. Lasers in Medical Science, 2025. pubmed.ncbi.nlm.nih.gov
Medically reviewed by Dr Sin Yong · Updated 20 October 2026
What happens during laser pigmentation removal?
Laser pigmentation removal uses light at a wavelength that melanin absorbs, so the pigment is broken into fragments that the skin then sheds or clears, while the surrounding skin is spared as far as the settings allow. It works on the pigment that is already there; it does not switch off what produced it.
On the day, the skin is cleansed, the eyes are protected and numbing cream is applied where the area or setting calls for it. Discrete sun spots and freckles often turn darker and form fine crusts that flake away on their own, whereas low-energy toning for diffuse pigment usually leaves only transient redness.
Not every brown mark should go straight to laser. Sun spots and freckles in the upper skin are the most predictable targets. Post-inflammatory marks respond more slowly and need the inflammation behind them controlled first. Melasma is treated only with conservative settings inside a wider plan, and Hori's naevus needs a deeper-reaching wavelength. A spot that is new, changing or irregular is examined before any cosmetic treatment.
In Fitzpatrick III to V skin, heat is what triggers rebound darkening, so energy is chosen cautiously and daily sun protection continues throughout.
Skin brightening treatment vs whitening: what is realistic?
A skin brightening treatment aims to even out tone and reduce excess pigment so the skin reflects light more uniformly; it does not change your natural skin colour, and no medical treatment should try to. Baseline colour is set by genetics. What can change is the pigment added on top of it: sun spots, freckles, post-inflammatory marks, melasma and the dullness of uneven texture.
In practice, brightening combines steps chosen for the pigment present: daily broad-spectrum sun protection, which matters more than any procedure under Singapore's ultraviolet levels; topical agents that reduce melanin production, such as azelaic acid, or hydroquinone under medical supervision; low-energy laser toning or R2 Glow for diffuse uneven tone; and pigment-targeting laser for discrete spots. Improvement is maintained rather than fixed, because sun exposure, hormones and inflammation keep adding pigment. Aiming for a lighter skin colour, rather than clearer and more even skin, is where people are most often sold products and procedures that carry risk without a medical basis. Assessment names the pigment types present and sets realistic goals for each.
Are skin whitening injections and creams safe?
Injectable whitening drips and unregistered whitening creams are where the risks in this area concentrate. The Health Sciences Authority (HSA) has repeatedly alerted the public to skin-lightening creams found to contain undeclared mercury, as well as cosmetic products found to contain potent undeclared ingredients such as steroids. Mercury can cause rashes, irritation and blotchy skin, and long-term exposure can affect the kidneys and nervous system; hidden steroids can thin the skin and cause acne-like eruptions.
Injections marketed for whitening, usually glutathione and sometimes high-dose vitamin C, are not an established treatment for pigmentation. Evidence for a lasting effect on skin colour is limited, products are sometimes of uncertain origin, and regulators elsewhere, including the Philippine Food and Drug Administration, have warned against injectable glutathione for skin lightening because of reported adverse effects. They are not part of the pigmentation plans described on this page. Products bought online that promise rapid whitening deserve particular caution, and HSA advises anyone who has used a product named in its alerts to stop and see a doctor if they feel unwell. If a product has irritated or darkened your skin, bring it to your assessment so the ingredients can be checked.
| Pigment type | Where the pigment sits | Laser approach usually considered | Main caution | What else the plan needs |
|---|---|---|---|---|
| Freckles (ephelides) | Upper epidermis | Pigment-targeting laser, such as 532 nm or picosecond, at settings matched to skin type | They return with sun exposure because the tendency remains | Daily sun protection under Singapore's year-round high ultraviolet levels |
| Solar lentigines (sun spots) | Epidermis | Pigment-targeting Q-switched or picosecond laser to discrete spots | Spots darken and flake before clearing; post-inflammatory darkening in Fitzpatrick III to V skin | Sun protection, and examination of any changing or irregular spot first |
| Post-inflammatory hyperpigmentation | Epidermis, sometimes dermis | Low-energy 1064 nm laser toning or R2 Glow for diffuse marks | Heat and inflammation can deepen it, so energy is kept low | Control of the acne, eczema or injury behind it, and topical lightening agents |
| Melasma | Epidermis and often dermis, with overactive melanocytes | Only sub-ablative, low-energy laser toning within a wider plan | Aggressive or ablative laser can cause rebound darkening | Strict sun protection, topical therapy, oral photoprotection and, after screening, oral tranexamic acid |
| Hori's naevus | Dermis | A deeper-reaching 1064 nm wavelength, Q-switched or picosecond, over a longer course | Post-inflammatory darkening is common after treatment | Correct diagnosis, since it is often mistaken for melasma or freckles |
Frequently Asked Questions
The number of sessions is planned individually. Solar lentigines and freckles are discrete epidermal pigment and generally need fewer sessions than PIH, which sits deeper and takes longer to clear. Melasma requires ongoing management rather than a fixed course — the interval for any maintenance treatment is set at review.
It can be, when performed by a physician using protocols suited to Asian skin. The risk of PIH from laser is higher in Fitzpatrick III–V skin (typical of Singapore patients) if energy levels are too high. Dr Sin Yong calibrates all laser treatments to the patient's skin tone at every session.
A combination approach: low-energy Q-switched laser toning, topical lightening agents, oral photoprotection (Heliocare Luminance), and rigorous daily SPF 50+. Melasma management is a long-term commitment — no single treatment eliminates it.
The type is identified by examination: the colour, border, pattern and distribution of the pigment, how it changes with the seasons and with hormones, and what preceded it, such as acne or sun exposure. Looking under magnification or particular lighting helps estimate how deep the pigment sits. Many people have more than one type at once, and the plan addresses each.
Most people describe a quick snapping or flicking sensation on the skin. Topical numbing cream is applied beforehand where the area or the setting calls for it. Comfort varies between individuals and between areas of the face, and it is discussed before treatment rather than assumed.
Direct sun exposure matters most, because ultraviolet light drives new pigment in freshly treated skin; broad-spectrum sun protection is used every day, as ultraviolet levels in Singapore are high year-round. Scrubs, peels and strong active ingredients are set aside until the skin settles, and treated spots that darken and flake should be left to shed on their own. Specific aftercare is given for the area treated.
Melasma often appears or darkens in pregnancy and may lighten after delivery. Laser treatment and several topical and oral agents, including hydroquinone, tretinoin and oral tranexamic acid, are generally deferred during pregnancy and breastfeeding. Careful sun protection is the mainstay in the meantime. Tell Dr Sin Yong if you are pregnant, planning pregnancy or breastfeeding.
Yes, but it is assessed differently from facial pigment. Darkening of the underarms, inner thighs or neck is often post-inflammatory, linked to friction, shaving or irritation, and is sometimes associated with insulin resistance, which is worth checking. The cause is addressed first, then topical agents and suitable laser settings are considered for the area.
Pigmentation is the normal colour that melanin gives the skin; hyperpigmentation means areas that are darker than the surrounding skin because of excess melanin. In everyday use, 'pigmentation' usually means hyperpigmentation, and melasma, sun spots, freckles and post-inflammatory marks all fall under it. Hyperpigmentation treatment therefore starts by naming which of these is present, because each responds differently.
Topical vitamin C is an antioxidant that can modestly reduce melanin formation and complements sunscreen, and it suits some people as part of a routine. It is a supporting step rather than a treatment for melasma, Hori's naevus or established sun spots, and stronger formulations can irritate. Stability and concentration vary widely between products.